﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Example
{
    class Polygon
    {
        protected 
            int width,height;
        public void setValues(int a, int b)
        {
            width = a;
            height = b;
        }
    }
        class Rectangle : Polygon
        {
            public int area()
            {
                return (width * height);
            }
        }
    class Triangle: Polygon{
        public int area(){
            return (width*height/2);
        }
    }
    class Program{
        static void Main(string[] args)
        {
            Rectangle rect = new Rectangle();
            Triangle trgl = new Triangle();
            rect.setValues(4, 5);
            trgl.setValues(4, 5);
            Console.WriteLine("recta:{0}", rect.area());
            Console.WriteLine("rectb:{0}", trgl.area());
          
        }
    }
}
